              (asg "masters"
                   cluster-unique
                   {:image_id mesos-ami
-                   :instance_type "m4.large"
+                   :instance_type master-instance-type
                    :sgs (concat [(cluster-id-of "aws_security_group" "master-security-group")
                                  (cluster-id-of "aws_security_group" "admin-security-group")
                                  (remote-output-of "vpc" "sg-sends-influx")

             (asg "public-slaves"
                  cluster-unique
                  {:image_id mesos-ami
                   :instance_type "m4.xlarge"
                   :sgs [(cluster-id-of "aws_security_group" "public-slave-security-group")
                         (remote-output-of "vpc" "sg-sends-influx")
                         (remote-output-of "vpc" "sg-sends-gelf")

             (asg "slaves"
                  cluster-unique
                  {:image_id mesos-ami
                   :instance_type slave-instance-type
                   :sgs (concat [(cluster-id-of "aws_security_group" "slave-security-group")
                                 (remote-output-of "vpc" "sg-all-servers")
                                 (remote-output-of "vpc" "sg-sends-influx")
